<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>优先级</title>
</head>
<body>
    <div class="father" id="father-div">
        二级div
    </div>
    <style>
        body div{
            color: #20f5ae;
        }
        div{
            color: brown;
            color: blueviolet;
        }
    </style>
</body>
</html>